Quick questions on Internal energy, temperature and thermal equilibrium (QCE Physics Unit 1)

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?

Show answer

Define internal energy and distinguish heat from temperature. [3 marks]

What is q2?

Show answer

0.50 \text{ kg}

of water at

80^\circ \text{C}

is poured into a calorimeter holding

0.50 \text{ kg}

of water at

20^\circ \text{C}

. Assuming no losses, calculate the equilibrium temperature. [3 marks]

What is q3?

Show answer

0.20 \text{ kg}

copper block at

150^\circ \text{C}

(

c = 390 \text{ J kg}^{-1} \text{ K}^{-1}

) is dropped into

0.80 \text{ kg}

of water at

20^\circ \text{C}

(

c = 4186 \text{ J kg}^{-1} \text{ K}^{-1}

). (a) Calculate the equilibrium temperature. (b) Explain the direction of heat flow at the microscopic level.

Have a question we have not covered?

This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.

All PhysicsQ&A pages